As law enforcement cracks down on car-insurance fraud plaguing the city, violence among the scammer thugs is getting worse, sources told The Post.

Schemes to stage fake accidents – or cause real ones – have been around for about a decade, involving sleazy clinics and lawyers that take advantage of New York’s no-fault insurance system to claim $50,000 for each “victim.”

Public pressure to reduce the city’s sky-high car-insurance rates has resulted in investigations and several hundred arrests in recent years.

As a result, gangsters have been murdering each other over territory, robbing enemy medical clinics and fighting over “runners” willing to get involved in car accidents.

In the past year, law-enforcement authorities have counted three or four “runners” murdered, and several robberies and non-fatal shootings, all in the Brighton Beach section of Brooklyn, where many Russian gangsters are based.

At a day-long summit staged by the insurance industry on the problem yesterday in Fort Hamilton, Brooklyn, Attorney General Eliot Spitzer urged insurance companies to fork over information to law enforcement.